An experimental system for testing the spectral characteristics of samples under electron beam excitation

Abstract

The invention discloses an experimental system for matching detection samples to produce spectral characteristics under the excitation of electron injection, belonging to the field of detection of terahertz radiation spectral characteristics. The system includes: a vacuum chamber, a vacuum system, a rotating control rod and an electron gun; the vacuum system provides a high-vacuum experimental environment for the free electron injection excitation sample; the rotation control rod can not only fix the electron gun but also control the angle of the electron injection excitation sample and position; a pair of observation windows installed on the top and bottom of the vacuum chamber can facilitate the real-time detection and analysis of the radiation field generated by the sample under the excitation of the electron beam by the terahertz time-domain spectrometer. A pair of observation windows installed at the front and rear The window can facilitate the experiment operator to observe the situation inside the vacuum chamber in real time. The entire system of the present invention has a reasonable design and is used in conjunction with a terahertz time-domain spectrometer to conveniently detect the spectral characteristics of the terahertz radiation produced by a sample under the excitation of free electron beams.

Description

technical field [0001] The invention belongs to the technical field of detection of terahertz radiation spectral characteristics, and specifically relates to an experimental system for detecting the spectral characteristics of terahertz radiation produced by a sample under the excitation of free electron beams by using a terahertz time-domain spectrum analyzer. [0002] technical background [0003] Terahertz wave (THz) refers to electromagnetic waves with a frequency between 0.1THz and 10THz. Terahertz waves are between microwave and infrared waves. Terahertz waves have many unique properties and have important applications in security detection, imaging, biomedicine, wireless communication and other fields. Due to the high frequency of terahertz, its spatial resolution is also very high; and because its pulse is very short (picosecond level), it has very high time resolution. Terahertz imaging technology and terahertz spectroscopy technology thus constitute the two main ke...

AI Technical Summary

Problems solved by technology

However, the existing terahertz time-domain spectroscopy platform cannot provide a high-vacuum experimental environment for electron injection excitation of graphene samples.

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